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1 3.3 pressure Pressure depends on force and area. Force Pressure = AreapascalA measure of how much force is acting on a certain area; how concentrated a force is.Pressure depends on surface area.Pressure =ForceAreaCHAPTERRESOURCESKEY CONCEPTSUMMARY

2 3.3 Pascal (Pa) Pressure depends on force and area.The unit used to measure pressure; one pascal is the pressure exerted by one newton of force on an area of one square meter, or one N/m2.CHAPTERRESOURCESKEY CONCEPTSUMMARY

3 Pressure depends on force and area.3.3Pressure depends on force and area.Pressure in a fluid acts in all directions.pressurepascalCHAPTERRESOURCESSECTIONOUTLINE

4 Pressure depends on force and area.3.3Pressure depends on force and area.Pressure =ForceAreapressurePressure in a fluid acts in all directions.pascalVISUALIZATIONSee how to lift a stool using a rubber mat and air pressure.SIMULATIONExplore how a fluid produces pressure.CHAPTERRESOURCESSECTIONOUTLINE

5 Fluids can exert a force on objects.3.4Fluids can exert a force on objects.• Buoyant force is equal to the weight of the displaced fluid.buoyant forceBernoulli's principlePascal’s principleCHAPTERRESOURCESSECTIONOUTLINE

6 3.4 buoyant force Fluids can exert a force on objects.Bernoulli's principleThe upward force on objects in a fluid; often called buoyancy.Pascal’s principleCHAPTERRESOURCESKEY CONCEPTSUMMARY

7 Try to crush the egg applying equal pressure.Air pressureMark intervals of 1cm along the length of one strawFill cup half way with colored waterHold the marked straw in the water (do not touch the bottom of the cupBlow across the top of the straw with different speeds and observe.Try to crush the egg applying equal pressure.

8 3.4 Bernoulli's principle Fluids can exert a force on objects.buoyant forceBernoulli's principleBernoulli's principleAn increase in the speed of a fluid decreases the pressure within the fluid.Pascal’s principleCHAPTERRESOURCESKEY CONCEPTSUMMARY

9 3.4 Pascal’s principle Fluids can exert a force on objects.A statement that says when an outside pressure is applied at any point to a fluid in a container, that pressure is transmitted throughout the fluid with equal strength.

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